Aristotle introduces in Physics II 3 what has been commonly called his theory of the four causes. However, in recent decades it has become equally common the idea that what Aristotle does in fact in this, and other related passages, is to introduce a theory about the different types of explanations we could offer for phenomena in the natural world. In this article, I argue against such an interpretation of the Aristotelian notion of alpha iota tau iota alpha presenting two arguments to this effect. The first one develops an objection from the textual evidence that is often invoked in support of that view. The second and more important one shows the inadequacy of such a view in order to understand the relation that Aristotle envisages between chance and causation.